Letters that make synchronous operation
s, a, o, e, n, p, c, h, r, t, i, u, y are letters that make 'synchronous operation'
Words within synchronous operation
ER, opera, synchro, nous, Opera, pe, ti, Ron, ERA, ration, at, ratio, Ro, Ono, on, synchronous, no, operation, rat, RA, US, NC, Io, ion, Ra, At, Er, No, Ti, hr, era, sync are words within 'synchronous operation'